Brandwave

Greenly vs Sweep:Which is more popular?

In September 2026, Greenly had more branded searches than Sweep among carbon accounting platforms worldwide. Greenly had about 530 branded searches, while Sweep had 70. Greenly made up 0.64% of all carbon accounting platform searches we track, and Sweep accounted for 0.09%. When we asked ChatGPT and Google AI Overviews about carbon accounting platforms, Greenly and Sweep each appeared in three of the five answers. Sweep was mentioned before Greenly in two out of three answers that named either.

Among carbon accounting platforms worldwide in September 2026

Who do people search for more?

Greenly, about 8 searches for every 1 for Sweep

Greenly 530 searchesSweep 70 searches

Who does AI mention more?

Both were mentioned in 3 of 5 answers.

Greenly in 3 of 5Sweep in 3 of 5

Who does AI recommend more?

Sweep, named ahead of Greenly in 2 of 3 answers

Sweep first in 2Greenly first in 1

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Top carbon accounting platforms in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Greenly and Sweep were each mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Sweep was listed before Greenly in two out of three answers that named either.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Watershed1st
  2. Persefoni2nd
  3. Sweep3rd
  4. Greenly4th
  5. Normative5th
  6. Plan A–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Persefoni4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Watershed4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Greenly3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Sweep3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Normative1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Plan A0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about carbon accounting platforms

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Is Greenly or Sweep more popular in search?

This chart shows how often people search Google for Greenly and Sweep by name. Each line represents a brand's share of searches for all six carbon accounting platforms we track, month by month, from English-language searches worldwide.

Greenly and Sweep among carbon accounting platforms worldwide, by month

Share of searches by month for Greenly, Sweep. The figures are in the table below the chart.

View monthly share of searches table
MonthPlan APersefoniGreenlyWatershedNormativeSweep
Oct 202591.4%7.3%0.53%0.43%0.23%0.08%
Nov 202591.3%7.3%0.62%0.43%0.23%0.09%
Dec 202591.7%7.3%0.38%0.35%0.18%0.09%
Jan 202692.7%6.2%0.4%0.45%0.16%0.1%
Feb 202692.1%6.8%0.38%0.4%0.23%0.09%
Mar 202694%5.1%0.33%0.3%0.14%0.13%
Apr 202692.9%6.1%0.39%0.36%0.12%0.1%
May 202693%6.1%0.34%0.36%0.14%0.1%
Jun 202692.5%6.5%0.34%0.39%0.14%0.08%
Jul 202692.4%6.5%0.37%0.47%0.1%0.11%
Aug 202693%6.1%0.34%0.36%0.11%0.06%
Sep 202693.2%5.4%0.64%0.47%0.26%0.09%

How has the Greenly and Sweep comparison changed over the last 12 months?

3 findings
  • Greenly was ahead of Sweep in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, Greenly’s share of searches among carbon accounting platforms worldwide moved from 0.53% to 0.64%, and its estimated monthly branded searches moved from 480 to 530.
  • Across the 12 months ending September 2026, Sweep’s share of searches among carbon accounting platforms worldwide moved from 0.08% to 0.09%, and its estimated monthly branded searches held steady at 70.

How did search popularity change for carbon accounting platforms worldwide in September 2026?

1 change

  1. In September 2026, Greenly rose from 4th to 3rd among carbon accounting platforms worldwide.

How are branded searches counted?

3 search terms

Brandwave collects information about searches that people make online using Greenly’s and Sweep’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Greenly

2 branded search terms

  • greenly app
  • greenly earth

Sweep

1 branded search term

  • sweep carbon

How the Brand Demand Index is measured

Other head-to-heads among carbon accounting platforms

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